US20190309823A1 - Power transmission device - Google Patents

Power transmission device Download PDF

Info

Publication number
US20190309823A1
US20190309823A1 US16/466,434 US201816466434A US2019309823A1 US 20190309823 A1 US20190309823 A1 US 20190309823A1 US 201816466434 A US201816466434 A US 201816466434A US 2019309823 A1 US2019309823 A1 US 2019309823A1
Authority
US
United States
Prior art keywords
rotor
flywheel
plate
damper
side rotary
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US16/466,434
Other languages
English (en)
Inventor
Yasunori Doman
Takeshi SENOUE
Yoshinari Yoshimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Exedy Corp
Original Assignee
Exedy Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Exedy Corp filed Critical Exedy Corp
Assigned to EXEDY CORPORATION reassignment EXEDY CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DOMAN, YASUNORI, SENOUE, TAKESHI, YOSHIMURA, YOSHINARI
Publication of US20190309823A1 publication Critical patent/US20190309823A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
    • F16F15/131—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon the rotating system comprising two or more gyratory masses
    • F16F15/133—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon the rotating system comprising two or more gyratory masses using springs as elastic members, e.g. metallic springs
    • F16F15/134—Wound springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D7/00—Slip couplings, e.g. slipping on overload, for absorbing shock
    • F16D7/02—Slip couplings, e.g. slipping on overload, for absorbing shock of the friction type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/30—Flywheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/30—Flywheels
    • F16F15/31—Flywheels characterised by means for varying the moment of inertia
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H45/00—Combinations of fluid gearings for conveying rotary motion with couplings or clutches
    • F16H45/02—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D13/00—Friction clutches
    • F16D13/22—Friction clutches with axially-movable clutching members
    • F16D13/38—Friction clutches with axially-movable clutching members with flat clutching surfaces, e.g. discs
    • F16D13/46—Friction clutches with axially-movable clutching members with flat clutching surfaces, e.g. discs in which two axially-movable members, of which one is attached to the driving side and the other to the driven side, are pressed from one side towards an axially-located member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
    • F16F15/131—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon the rotating system comprising two or more gyratory masses
    • F16F15/13128—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon the rotating system comprising two or more gyratory masses the damping action being at least partially controlled by centrifugal masses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H45/00—Combinations of fluid gearings for conveying rotary motion with couplings or clutches
    • F16H45/02—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic type
    • F16H2045/0221—Combinations of fluid gearings for conveying rotary motion with couplings or clutches with mechanical clutches for bridging a fluid gearing of the hydrokinetic type with damping means

Definitions

  • the present disclosure relates to a power transmission device.
  • a power transmission device for instance, a flywheel assembly includes a first flywheel (input-side rotary part), a second flywheel (output-side rotary part) and a damper mechanism (damper part).
  • a torque from an engine is inputted to the first flywheel.
  • the second flywheel is configured to be rotatable relative to the first flywheel.
  • the damper mechanism transmits the torque from the first flywheel to the second flywheel. See Japan Laid-open Patent Application Publication No. 2013-167312.
  • the present disclosure has been produced in view of the aforementioned drawback. It is an object of the present disclosure to preferably and suitably actuate a power transmission device in accordance with vibration inputted thereto.
  • a power transmission device includes an input-side rotary part, an output-side rotary part and a damper part.
  • the input-side rotary part is a part to which a torque is inputted from an engine.
  • the output-side rotary part includes a first rotor and a second rotor.
  • the first rotor is configured to be rotatable relative to the input-side rotary part.
  • the second rotor is configured to be unitarily rotatable with the first rotor, and is configured to be rotatable relative to the first rotor when the torque fluctuates with a predetermined magnitude or greater.
  • the damper part elastically couples the input-side rotary part and the output-side rotary part.
  • the first rotor when the magnitude of fluctuations in torque inputted to the first rotor reaches a predetermined magnitude while the output-side rotary part (the first rotor and the second rotor) is being rotated relative to the input-side rotary part, the first rotor is rotated relative to the input-side rotary part, whereas the second rotor is rotated relative to the first rotor.
  • a vibration system thereof can be changed between before and after the magnitude of fluctuations in torque reaches the predetermined magnitude. Because of this, it is possible to preferably and suitably actuate the power transmission device in accordance with vibration inputted thereto.
  • the power transmission device further includes a holding part.
  • the holding part holds the first rotor and the second rotor such that the first rotor and the second rotor are unitarily rotatable when the torque fluctuates with less than the predetermined magnitude.
  • the first rotor and the second rotor when the torque fluctuates with less than the predetermined magnitude, can be preferably and suitably rotated unitarily with each other by the holding part. Because of this, when the torque fluctuates with less than the predetermined magnitude, the output-side rotary part (the first rotor and the second rotor) can be stably rotated relative to the input-side rotary part.
  • the holding part releases holding of the first rotor and the second rotor when the torque fluctuates with the predetermined magnitude or greater.
  • the second rotor can be preferably and suitably rotated relative to the first rotor when the torque fluctuates with the predetermined magnitude or greater.
  • the second rotor is provided in the first rotor through the holding part.
  • the second rotor can be preferably and suitably rotated unitarily with the first rotor when the torque fluctuates with less than the predetermined magnitude, whereas the second rotor can be preferably and suitably rotated relative to the first rotor when the torque fluctuates with the predetermined magnitude or greater.
  • the second rotor is rotated with respect to the first rotor in a rotational direction of the first rotor when the torque fluctuates with the predetermined magnitude or greater.
  • the second rotor can be smoothly rotated relative to the first rotor.
  • the damper part elastically couples the input-side rotary part and the first rotor.
  • the toque can be preferably and suitably transmitted from the input-side rotary part to the first rotor, and simultaneously, the second rotor can be preferably and suitably rotated relative to the first rotor.
  • a power transmission device can be preferably and suitably actuated in accordance with vibration inputted thereto.
  • FIG. 1 is a cross-sectional diagram schematically showing a flywheel assembly according to a first embodiment.
  • FIG. 2 is a cross-sectional diagram schematically showing a damper device according to a second embodiment.
  • FIG. 3 is a cross-sectional diagram schematically showing a damper device according to a modification of the second embodiment.
  • FIG. 1 is a cross-sectional diagram schematically expressing a flywheel assembly 1 according to an embodiment of the present disclosure.
  • the flywheel assembly 1 transmits a torque, transmitted thereto from a crankshaft 2 , to a transmission through a clutch device 50 .
  • the flywheel assembly 1 includes a first flywheel 4 (exemplary input-side rotary part), a second flywheel 5 (exemplary output-side rotary part), a damper structure 6 (exemplary damper part) and a holding structure 8 (exemplary holding part). It should be noted that in FIG. 1 , an engine is disposed on the left side whereas the transmission is disposed on the right side.
  • a torque is inputted to the first flywheel 4 from the engine.
  • the torque is inputted to the first flywheel 4 from the engine-side crankshaft 2 .
  • the first flywheel 4 is fixed to the crankshaft 2 by fixation means such as at least one fixation bolt.
  • the first flywheel 4 includes a first plate 21 and a second plate 22 .
  • the first plate 21 includes a first plate body 24 and a plurality of first damper accommodation parts 25 .
  • the first plate body 24 has a substantially annular shape.
  • the first plate body 24 makes contact at the inner peripheral part thereof with the outer peripheral surface of a protruding portion 2 a for positioning use in the crankshaft 2 . Because of this, the first plate body 24 is radially positioned by the crankshaft 2 .
  • the respective plural first damper accommodation parts 25 are provided in the outer peripheral part of the first plate 21 .
  • the respective plural first damper accommodation parts 25 are provided in the outer peripheral part of the first plate 21 , while being aligned about a rotational axis O at predetermined intervals in a circumferential direction.
  • the second plate 22 includes a second plate body 30 and a plurality of damper accommodation parts 31 .
  • the second plate body 30 has a substantially annular shape.
  • the second plate body 30 is fixed at the outer peripheral part thereof to an outer tubular portion 21 a provided in the outer peripheral part of the first plate 21 and outer peripheral portions 25 a of the first damper accommodation parts 25 .
  • the second plate body 30 is disposed in axial opposition to the first plate body 24 .
  • the plural second damper accommodation parts 31 are disposed in axial opposition to the plural first damper accommodation parts 25 , respectively. Specifically, the plural second damper accommodation parts 31 are disposed in axial opposition to the plural first damper accommodation parts 25 , respectively, while being aligned at predetermined intervals in the circumferential direction.
  • the first damper accommodation parts 25 and the second damper accommodation parts 31 are herein formed such that the axial width therebetween is wider than that between the first plate body 24 and the second plate body 30 .
  • the damper structure 6 is accommodated in accommodation spaces formed by the first damper accommodation parts 25 and the second damper accommodation parts 31 .
  • the second flywheel 5 includes a second flywheel body 37 (exemplary first rotor) and an inertia part 38 (exemplary second rotor).
  • the second flywheel body 37 is configured to be rotatable relative to the first flywheel 4 .
  • the second flywheel body 37 is rotatably supported by a center boss 3 , fixed to the crankshaft 2 , through a bearing 9 .
  • the second flywheel body 37 is provided with an engaging part 39 , a plurality of recesses 40 and a contact surface 41 .
  • the engaging part 39 includes an annular portion 39 a and a plurality of first transmission portions 39 b .
  • the annular portion 39 a is disposed radially inside the damper structure 6 .
  • the respective plural first transmission portions 39 b are portions that receive a torque from the damper structure 6 after the torque is transmitted to the damper structure 6 from the first flywheel 4 .
  • the respective plural first transmission portions 39 b are provided on the outer periphery of the annular portion 39 a .
  • the respective plural first transmission portions 39 b are provided on the outer periphery of the annular portion 39 a , while being aligned at predetermined intervals in the circumferential direction.
  • each of the plural first transmission portions 39 b extend radially outward from the annular portion 39 a , and are disposed in the aforementioned accommodation spaces. Additionally, each of the plural first transmission portions 39 b is disposed between circumferentially adjacent two of spring seats 43 in the damper structure 6 .
  • the respective plural recesses 40 are provided in the outer peripheral part of the second flywheel body 37 , while being aligned at intervals in the circumferential direction.
  • the respective plural recesses 40 are opened toward the inertia part 38 .
  • the contact surface 41 is a surface with which one of friction members 52 a of a cushioning plate 52 in the clutch device 50 (to be described) makes contact. Specifically, when the one friction member 52 a of the cushioning plate 52 makes contact with the contact surface 41 , the torque is transmitted from the flywheel assembly 1 to the clutch device 50 . On the other hand, when the one friction member 52 a of the cushioning plate 52 separates from the contact surface 41 , transmission of the torque from the flywheel assembly 1 to the clutch device 50 is disabled.
  • the inertia part 38 is configured to be rotatable unitarily with the second flywheel body 37 . Furthermore, the inertia part 38 is configured to be rotatable relative to the second flywheel body 37 when the magnitude of fluctuations in torque inputted to the second flywheel 5 (input torque fluctuations) becomes a predetermined magnitude or greater. It should be noted that the term “torque fluctuations” also encompasses meaning of “torque fluctuations occurring with rotational velocity fluctuations”.
  • the inertia part 38 has a substantially annular shape.
  • the inertia part 38 is disposed on the outer periphery of the second flywheel body 37 .
  • the inertia part 38 is held by the holding structure 8 .
  • the inertia part 38 is released from being held by the holding structure 8 and is rotated relative to the second flywheel body 37 .
  • the inertia part 38 is released from being held by the holding structure 8 and is rotated in the same rotational direction as the second flywheel body 37 .
  • the damper structure 6 elastically couples the first flywheel 4 and the second flywheel 5 , and transmits a torque from the first flywheel 4 to the second flywheel 5 .
  • the damper structure 6 includes a plurality of first torsion springs 42 and the plurality of spring seats 43 .
  • the plural first torsion springs 42 are disposed in the aforementioned accommodation spaces, respectively.
  • the respective plural spring seats 43 are disposed on the both ends of the respective plural first torsion springs 42 . Additionally, the spring seats 43 , disposed on the both ends of the respective first torsion springs 42 , are also disposed in the aforementioned accommodation spaces, respectively.
  • the first flywheel 4 makes contact at the first plate body 24 of the first plate 21 and the second plate body 30 of the second plate 22 with each one-side spring seat 43 .
  • the second flywheel 5 makes contact at each first transmission portion 39 b with each other-side spring seat 43 .
  • the holding structure 8 holds the second flywheel body 37 and the inertia part 38 so as to make the both unitarily rotatable. On the other hand, when the magnitude of input torque fluctuations is greater than or equal to the predetermined magnitude, the holding structure 8 releases holding of the second flywheel body 37 and the inertia part 38 .
  • the holding structure 8 is composed of a first holding plate 44 , a second holding plate 45 , a cone spring 46 , and the plural recesses 40 of the aforementioned second flywheel body 37 .
  • the first holding plate 44 is configured to be unitarily rotatable with the second flywheel body 37 .
  • the first holding plate 44 herein has a substantially annular shape.
  • the first holding plate 44 is fixed to the second flywheel body 37 by fixation means such as at least one bolt.
  • the second holding plate 45 is configured to be unitarily rotatable with the second flywheel body 37 .
  • the second holding plate 45 is disposed at an interval from the first holding plate 44 in the axial direction.
  • the second holding plate 45 is an annular member having an L-shaped cross section.
  • the second holding plate 45 is provided with a plurality of protrusions 45 a .
  • the respective plural protrusions 45 a are provided in the inner peripheral part of the second holding plate 45 , and protrude in the axial direction.
  • the respective plural protrusions 45 a are provided at intervals in the circumferential direction.
  • the plural protrusions 45 a are separately disposed in the plural recesses 40 of the second flywheel body 37 , respectively. Because of this, the second holding plate 45 is made unitarily rotatable with the second flywheel body 37 and is also made movable in the axial direction.
  • the cone spring 46 is disposed axially between the second holding plate 45 and a part provided with the plural recesses 40 in the second flywheel body 37 .
  • the cone spring 46 is disposed axially between the second holding plate 45 and the opening-side end surfaces of the plural recesses 40 . In this state, the cone spring 46 makes contact at the inner peripheral part thereof with the end surfaces of the plural recesses 40 , while making contact at the outer peripheral part thereof with the second holding plate 45 .
  • the inertia part 38 is interposed and held between the first holding plate 44 and the second holding plate 45 through the cone spring 46 .
  • the inertia part 38 is interposed and held between the first holding plate 44 and the second holding plate 45 through the cone spring 46 .
  • the inertia part 38 is unitarily rotated with the second flywheel body 37 through the holding structure 8 .
  • the inertia part 38 is released from being interposed and held by the holding structure 8 .
  • a rotation-directional inertia force acting on the inertia part 38 becomes greater than a holding force (e.g., a friction force) applied between the holding structure 8 (the first holding plate 44 and the second holding plate 45 ) and the inertia part 38 .
  • a holding force e.g., a friction force
  • the inertia part 38 slides against the first holding plate 44 and the second holding plate 45 in the rotational direction of the second flywheel body 37 .
  • the inertia part 38 is rotated relative to the second flywheel body 37 .
  • the clutch device 50 transmits a torque from the flywheel assembly 1 to a transmission-side member 10 , and also, disables transmission of the torque from the flywheel assembly 1 to the transmission-side member 10 .
  • the clutch device 50 includes a clutch cover 51 , the cushioning plate 52 , a pair of plates 53 for clutch use, a pressure plate 54 , a diaphragm spring 55 , an output hub 56 , and a plurality of second torsion springs 57 .
  • the clutch cover 51 is attached to the flywheel assembly 1 .
  • the clutch cover 51 is herein fixed to the second flywheel body 37 of the flywheel assembly 1 by fixation means such as at least one bolt (not shown in the drawing).
  • the cushioning plate 52 has a substantially annular shape.
  • the cushioning plate 52 is disposed in opposition to the second flywheel body 37 .
  • the cushioning plate 52 is disposed in opposition to the contact surface 41 of the second flywheel body 37 .
  • the friction members 52 a are attached to the both surfaces of the cushioning plate 52 .
  • the cushioning plate 52 is fixed to one of the pair of plates 53 for clutch use, while being unitarily rotatable therewith.
  • the pair of plates 53 for clutch use each having a substantially annular shape, is disposed in axial opposition to each other. Specifically, the pair of plates 53 for clutch use is disposed at an interval from each other in the axial direction. The pair of plates 53 for clutch use is fixed to each other by fixation means such as at least one rivet (not shown in the drawing).
  • the pressure plate 54 presses the cushioning plate 52 to which the friction members 52 a are attached.
  • the pressure plate 54 has a substantially annular shape.
  • the pressure plate 54 is disposed axially between the cushioning plate 52 and the diaphragm spring 55 .
  • the pressure plate 54 is urged by the diaphragm spring 55 toward the contact surface 41 of the second flywheel body 37 .
  • the diaphragm spring 55 presses the pressure plate 54 .
  • the outer peripheral part of the diaphragm spring 55 is disposed axially between the pressure plate 54 and the clutch cover 51 .
  • the inner peripheral part of the diaphragm spring 55 is pressed by a pressure applying member (not shown in the drawing).
  • the middle part of the diaphragm spring 55 is supported by the clutch cover 51 .
  • the output hub 56 is attached to the transmission-side member 10 , while being unitarily rotatable therewith.
  • a boss portion 56 a of the output hub 56 is attached to the transmission-side member 10 by spline coupling, while being unitarily rotatable therewith.
  • a flange portion 56 b of the output hub 56 is disposed axially between the pair of plates 53 for clutch use.
  • the flange portion 56 b is provided with a plurality of second transmission portions 56 c in the outer peripheral part thereof.
  • the plural second transmission portions 56 c are separately engaged with the plural second torsion springs 57 , respectively.
  • the respective plural second transmission portions 56 c protrude radially outward from the flange portion 56 b , while being aligned at intervals in the circumferential direction.
  • the plural second torsion springs 57 elastically couple the pair of plates 53 for clutch use and the output hub 56 .
  • each of the plural second torsion springs 57 is disposed between circumferentially adjacent two of the second transmission portions 56 c .
  • the plural second torsion springs 57 are disposed in pairs of window portions 53 a of the pair of plates 53 for clutch use, respectively.
  • the second flywheel body 37 and the inertia part 38 are rotated relative to the first flywheel 4 while being held by the holding structure 8 .
  • the magnitude of input torque fluctuations is greater than or equal to the predetermined magnitude, the inertia part 38 is released from being interposed and held by the holding structure 8 , and is thereby rotated relative to the second flywheel body 37 .
  • the flywheel assembly 1 when the magnitude of input torque fluctuations reaches the predetermined magnitude, the second flywheel body 37 is rotated relative to the first flywheel 4 , whereas the inertia part 38 is rotated relative to the second flywheel body 37 .
  • a vibration system of the flywheel assembly 1 can be changed between before and after the magnitude of input torque fluctuations reaches the predetermined magnitude. Because of this, the flywheel assembly 1 can be preferably and suitably actuated in accordance with vibration inputted to the flywheel assembly 1 .
  • the aforementioned first embodiment has exemplified the configuration of the flywheel assembly 1 that when the magnitude of input torque fluctuations reaches the predetermined magnitude, the second flywheel body 37 is rotated relative to the first flywheel 4 whereas the inertia part 38 is rotated relative to the second flywheel body 37 .
  • the present disclosure can be applied to a damper device 101 (exemplary power transmission device) shown in FIG. 2 .
  • Configurations of the present disclosure, characterized in realizing the present disclosure, will be herein explained in detail, but the other configurations will be briefly explained.
  • the damper device 101 transmits a torque, transmitted thereto from the engine-side crankshaft 2 , to the transmission.
  • the damper device 101 includes an input-side rotary part 110 , an output-side rotary part 111 , a damper part 112 and a holding structure 118 (exemplary holding part).
  • the input-side rotary part 110 is fixed to the crankshaft 2 by fixation means such as at least one fixation bolt.
  • the input-side rotary part 110 is provided with a plurality of third transmission portions 110 a separately engaged with the damper part 112 .
  • the output-side rotary part 111 is configured to be rotatable relative to the input-side rotary part 110 .
  • the output-side rotary part 111 includes first to third output-side plates 113 , 114 and 115 (exemplary first rotor) and an inertia part 138 (exemplary second rotor).
  • the first to third output-side plates 113 , 114 and 115 are configured to be rotatable relative to the input-side rotary part 110 .
  • the first output-side plate 113 and the second output-side plate 114 are disposed in axial opposition to each other.
  • the third output-side plate 115 includes a boss portion 115 a and a plate body 115 b .
  • the boss portion 115 a is attached to the transmission-side member 10 by coupling means such as spline coupling, while being unitarily rotatable therewith.
  • the plate body 115 b extends radially outward from the outer peripheral surface of the boss portion 115 a .
  • the plate body 115 b is provided with a plurality of holes 115 c in the outer peripheral part thereof.
  • the plate body 115 b is provided with an outer tubular portion 115 d as the outer peripheral end thereof.
  • the first output-side plate 113 and the second output-side plate 114 are fixed to the inner peripheral part of the plate body 115 b by fixation means such as at least one bolt.
  • the inertia part 138 is configured to be unitarily rotatable with the third output-side plate 115 through the holding structure 118 . Additionally, when the magnitude of input torque fluctuations, i.e., the magnitude of fluctuations in torque inputted to the first to third output-side plates 113 , 114 and 115 is greater than or equal to a predetermined magnitude, the inertia part 138 is configured to be rotatable relative to the first to third output-side plates 113 , 114 and 115 .
  • the inertia part 138 is released from being held by the holding structure 118 , and is thereby rotated relative to the first to third output-side plates 113 , 114 and 115 in the same rotational direction as the first to third output-side plates 113 , 114 and 115 .
  • the damper part 112 elastically couples the input-side rotary part 110 and the output-side rotary part 111 .
  • the damper part 112 includes a plurality of third torsion springs 119 .
  • Each of the plural third torsion springs 119 is disposed between circumferentially adjacent two of the third transmission portions 110 a in the input-side rotary part 110 .
  • the plural third torsion springs 119 are disposed in a plurality of pairs of window portions 113 a and 114 a of the output-side rotary part 111 (the first and second output-side plates 113 and 114 ), respectively.
  • the holding structure 118 is composed of a first holding plate 120 , a second holding plate 121 , a cone spring 122 , and the aforementioned plural holes 115 c of the third output-side plate 115 .
  • the first holding plate 120 is fixed to the outer tubular portion 115 d of the third output-side plate 115 by fixation means such as welding.
  • the inertia part 138 is disposed in a space enclosed by the first holding plate 120 , the outer tubular portion 115 d of the third output-side plate 115 and the outer peripheral part of the third output-side plate 115 .
  • the second holding plate 121 is configured to be unitarily rotatable with the third output-side plate 115 .
  • the second holding plate 121 is disposed in axial opposition to the first holding plate 120 .
  • the second holding plate 121 is provided with a plurality of protruding portions 121 a .
  • the plural protruding portions 121 a are separately disposed in the plural holes 115 c of the third output-side plate 115 , respectively.
  • the cone spring 122 is disposed axially between the second holding plate 121 and the outer peripheral part of the third output-side plate 115 (the plate body 115 b ).
  • the inertia part 138 is released from being held by the holding structure 118 , and is thereby rotated relative to the first to third output-side plates 113 , 114 and 115 . Because of this, a vibration system of the damper device 101 can be changed between before and after the magnitude of input torque fluctuations reaches the predetermined magnitude. In other words, it is possible to preferably and suitably actuate the damper device 101 in accordance with vibration inputted to the damper device 101 .
  • An embodiment herein described is a modification of the second embodiment.
  • the second embodiment has exemplified the configuration that the output-side rotary part 111 includes the first to third output-side plates 113 , 114 and 115 .
  • an input-side rotary part 210 includes first and second input-side plates 211 and 212
  • an output-side rotary part 211 includes fourth and fifth output-side plates 213 and 214 .
  • the first and second input-side plates 211 and 212 are configured to be unitarily rotatable with each other.
  • the first and second input-side plates 211 and 212 are provided with a plurality of pairs of window portions 211 a and 212 a .
  • a plurality of fourth torsion springs 216 in a damper part 215 are disposed in the plural pairs of window portions 211 a and 212 a , respectively.
  • the fourth output-side plate 213 includes a boss portion 213 a and a plate body 213 b .
  • the boss portion 213 a is attached to the transmission-side member 10 by coupling means such as spline coupling, while being unitarily rotatable therewith.
  • the plate body 213 b extends radially outward from the outer peripheral surface of the boss portion 213 a .
  • a plurality of fourth transmission portions 213 c are provided in the outer peripheral part of the plate body 213 b , while being aligned at intervals in the circumferential direction.
  • Each of the plural fourth torsion springs 216 is disposed between circumferentially adjacent two of the plural fourth transmission portions 213 c.
  • the fifth output-side plate 214 is configured substantially the same as the plate body 115 b of the third output-side plate 115 in the aforementioned second embodiment. Additionally, an inertia part 238 (exemplary second rotor) and a holding structure 218 (exemplary holding part) are configured substantially the same as corresponding ones in the aforementioned second embodiment. Because of this, explanation of these components will be herein omitted, and reference signs assigned thereto are the same as those assigned to the corresponding ones in the aforementioned second embodiment.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Operated Clutches (AREA)
US16/466,434 2017-02-03 2018-01-15 Power transmission device Abandoned US20190309823A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2017018713A JP6708565B2 (ja) 2017-02-03 2017-02-03 動力伝達装置
JP2017-018713 2017-02-03
PCT/JP2018/000763 WO2018142890A1 (ja) 2017-02-03 2018-01-15 動力伝達装置

Publications (1)

Publication Number Publication Date
US20190309823A1 true US20190309823A1 (en) 2019-10-10

Family

ID=63039643

Family Applications (1)

Application Number Title Priority Date Filing Date
US16/466,434 Abandoned US20190309823A1 (en) 2017-02-03 2018-01-15 Power transmission device

Country Status (4)

Country Link
US (1) US20190309823A1 (ja)
JP (1) JP6708565B2 (ja)
DE (1) DE112018000212T5 (ja)
WO (1) WO2018142890A1 (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7126419B2 (ja) * 2018-09-26 2022-08-26 株式会社エクセディ 動力伝達装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0571588A (ja) * 1991-09-13 1993-03-23 Atsugi Unisia Corp フライホイール
JP5585377B2 (ja) * 2010-10-20 2014-09-10 トヨタ自動車株式会社 トルクリミッタ機構を備えたダンパ装置
US9958027B2 (en) * 2012-04-27 2018-05-01 Toyota Jidosha Kabushiki Kaisha Vibration damping device

Also Published As

Publication number Publication date
JP2018123943A (ja) 2018-08-09
JP6708565B2 (ja) 2020-06-10
WO2018142890A1 (ja) 2018-08-09
DE112018000212T5 (de) 2019-09-05

Similar Documents

Publication Publication Date Title
US10648532B2 (en) Damper device
JP6965566B2 (ja) トルク変動吸収装置
EP2527682A2 (en) Torque fluctuation absorbing apparatus
US20130035170A1 (en) Damper mechanism
JP6632601B2 (ja) 多板デュアルクラッチ
US11408468B2 (en) Torque limiter embedded damper device
US20190309823A1 (en) Power transmission device
KR101141016B1 (ko) 더블클러치
US20200072293A1 (en) Power transmission device
US11428291B2 (en) Damper device
CN111692282B (zh) 减振装置
JP7472166B2 (ja) マルチプレートクラッチ、特にハイブリッドドライブトレイン用の特に乾式マルチプレートクラッチ
US11796010B2 (en) Torque limiter device
US20210102599A1 (en) Torque limiter and power transmission device
EP2963311A2 (en) Damper device
US20190128368A1 (en) Damper device for vehicle
US11619281B2 (en) Damper device
US11619282B2 (en) Damper device
US20240035524A1 (en) Damper device
US20220412410A1 (en) Damper device
US20230243388A1 (en) Damper device
CN114526312A (zh) 具有离合器的减振装置
CN114526313A (zh) 具有离合器的减振装置

Legal Events

Date Code Title Description
AS Assignment

Owner name: EXEDY CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DOMAN, YASUNORI;SENOUE, TAKESHI;YOSHIMURA, YOSHINARI;REEL/FRAME:049361/0515

Effective date: 20190521

STPP Information on status: patent application and granting procedure in general

Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION